/Engine/Source/Runtime/Slate/Public/Framework/Application/SWindowTitleBar.h
Called when the mouse is moved over the widget's window, to determine if we should report whether OS-specific features should be active at this location (such as a title bar grip, system menu, etc.) Usually you should not need to override this function.
The window "zone" the cursor is over, orEWindowZone::Unspecifiedif no special behavior is needed
virtual [EWindowZone::Type](API\Runtime\ApplicationCore\GenericPlatform\EWindowZone__Type) GetWindowZoneOverride() const